In this blog post, the authors use a series of SPARQL queries to probe the content in the UK's data.gov. The techniques demonstrated can be used to probe any triple store to gain an understanding of what type of data is hosted by a triple store. The authors leveraged a web service http://data-gov.tw.rpi.edu/ws/sparqlproxy.php to convert SPARQL/XMl result into HTML and JSON.
URL: http://tw.rpi.edu/weblog/2009/10/23/probing-the-sparql-endpoint-of-datagovuk/
Keywords: PHP, JSON, SPARQL endpoint, Government Open Data
Author: Ding, Li
Publisher: Tetherless World Constellation (TWC)
Date created: 2009-10-23 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
- Understands the major SPARQL result set modifiers, e.g., to limit or sort results, or to return distinct results only once.
- Uses available tools, servers, and endpoints to issue queries against a dataset.
- Uses an RDF programming library to serialize RDF data in available syntaxes.
- Uses variables in SELECT and WHERE clauses to yield a table of results.